Exhaust and suction nozzle



Sept. 16, 1941. F. H. CARROLL .Y EXHAUST AND SUCTION NOZZLE Filed July l1, 1940 INVENTOR. TEK-: P H- F/'RRLL Patented Sept. 16, 1941 UNITED STATES PATENT oFFICE EXHAUST AND SUCTION NOZZLE Fred H. Carroll, Jacksonville, Fla.

Application July 11, 1940, Serial No. 344,944

(Cl. ZBO-100) Claims.

This invention relates to improvements in exhaust and suction nozzles for locomotive engines, stationary engines and internal combustion engmes.

It is the primary object of this invention to provide an improved, simple and highly efficient exhaust and suction nozzle of the type described above which is of sturdy construction, can readily and easily be assembled and, when installed in engines, permits of reduction of back pressure in a high degree.

Another object of the invention is the provision of an exhaust and suction nozzle of the type referred to above which is made of two flanged, specifically constructed, co-operating portions rigidly secured to each other in such a manner that the assembled nozzle embodies an axial exhaust passage and a plurality of elongated inclined suction passages arranged in the circumferential wall of the nozzle.

With these and incidental objects in View, the invention consists in certain novel features of construction and combination of parts, the essential elements of which are set forth in the appended claims; and a preferred form of embodiment of the invention is hereinafter shown with reference to the drawing accompanying and forming part of this specification.

In the drawing:

Fig. 1 is a sectional View through an exhaust and suction nozzle according to the invention, the section being taken on line I-I of Fig. 2.

Fig. 2 is a cross sectional view through the nozzle shown in Fig. 1, the section being taken on line 2-2 of Fig. 1.

Fig. 3 is a reduced cross sectional view on line 3-3 of Fig. 1, and

Fig. 4 is a fragmentary sectional View on line 4-4 of Fig. 1.

Referring now to the drawing, reference numeral 2 designates my improved exhaust and suction nozzle which embodies a passaged, coneshaped body 3 and a ring-shaped top member 4 seated upon said body and secured thereto by means of bolts 5. Body 3 at its upper portion 6 includes a plurality of downwardly extended symmetrically arranged lugs 1, integrally formed with said body and perforated at B. In addition, body 3 has at its top face outwardly perforated wall portions 9 which are located between lugs l and inclined at an angle of approximately 45 with respect to the axis of said body.

The perforated lugs 'I of body 3 support and mount ring-shaped top member 4 which is substantially larger in diameter than body 3 and provided with a plurality of lugs II). These lugs extend integrally from the bottom face of said member over the entire width thereof. Lugs I0 are equal to the number of lugs 1, arranged in alignment With said lugs and perforated at II to permit of the bolts 5 being readily extended through top member 4 and body 3 for their alignment and attachment to each other.

Top member 4 is provided with inclined wall` portions I2 arranged at its bottom face between lugs I0 and the Wall portions are inwardly inclined at an angle of approximately 45 with respect to the axis of said top member. When top member 4 is rested on and secured to body3 by means of bolts 5, lugs I0 rest on lugs 'I and inclined wall portions 9 and I2 are vertically aligned in spaced relation with respect to each other, so that the lugs and Wall portions form a plurality of inclined suction passages I4 having substantial rectangular cross section. These passages have their outlets I5 arranged in the circrunferential inner wall I6 of the exhaust and suction nozzle and converge toward the axis of said nozzle somewhat above its outlet I6'.

The thus described exhaust nozzle, when-attached to the exhaust of a locomotive engine, guides exhaust steam through its cone-shaped exhaust passage I1, effects acceleration of such steam in said passage, due to the decrease in cross section of passage I1, and, inally, effects discharge of such steam through the outlet I6' in top member 4. The steam passing through the nozzle effects a substantial suction at the outlets I5 of passages I4 and thereby draws smoke and combustion gas from the smoke box of the locomotive engine, it being understood that the exhaust nozzle is mounted as customary in the smoke box of the locomotive engine. The suction in passages I4 of the nozzle is due to the increase in velocity of the exhaust steam near outlets l5 of the suction passages I4 and due to the inclination of the passages I4 which acts to increase the relative pressure at the inlets of passages I4.

Exhaust nozzles of the type described can readily `be cast and are usable for various steam capacities and pressures. Such nozzles can also be adjusted to the desired rate of draft by properly dimensioned gaskets I8 arranged between body 3 and top member 4, the thickness of such gaskets determining the effective size of passages and therewith controlling the rate of suction in such passages.

Having thus described my invention, what I claim is:

1. An exhaust and suction nozzle comprising a body having an axial passage and inclined suction passages arranged in the Wall of said body circumferentially thereof, said passages terminating adjacent to said axial passage to avoid its restriction and converging toward each other and the axis of said axial passage above said nozzle biody.

i 2. An exhaust and suction nozzle comprisingv Y Y a body having an axial passage, a ring-shaped top secured to said body in spaced relaton'with respect thereto, and aligned, spaced and inclinedV wall portions on said body andtop arranged opprosite toeachother, said wall portions being separated by straight wall portions and providing inclined suction passages in the wall v of said nozzle between said body and top portions, the outlets of said suction passages terminating ,atl

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top, said lugs spacing said body and top portion vertically from each other and forming with said beveled wall portions inclined suction passages extended adjacent to said axial passage without said body and top arranged between their lugs,

said axial passage and being in direct cornmunication therewith.

3. An exhaust and suction nozzle4 comprising a y "body having an axialpassage, a ring-shaped top portion, la plurality of narrow lugs downwardly extended from said top portion in radial relation with respect theretmand spaced, oppositely arranged beveled wall portions on said body and said Alugs and beveled wall portions forming inclined suction passages extending into said axial passage without restricting same.

5. An exhaust and suction nozzle as described in claim 4, wherein the circumferential outer edge of said ring-shaped top is arranged above said suction passages and extends a substantialV distance laterally beyond the inlet openings of said suction passages for shielding same fromthe suction eiect of said axial passage.

FRED CARROLL. 

